Does the Beer need to be repitched after clarifying with Gelatine , to have a proper carbonation at the end ?!

Hector

It is not necessary, even though your beer is crystal clear there is still enough yeast in solution to properly carbonate your beer. It may take a little longer. Having said that I would pitch an appropriate amount of dry yeast to bottle carbonate a big or really big beer (ie anything above about 1.060) just because it takes a long time anyways and the few remaining yeast after fining are tired and sickly given the high alcohol content.

I just put some gelatin into a keg and have let it sit in my kegerator for a few days. Is it necessary to rack into a new keg to prevent the gelatin from plugging up the diptube or is this not usually a problem?

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It will still drop out. If your haziness is attributed to yeast alone, just let it sit in the keg a few days at cold temp. It will settle and come out in the first pint or two.

It's been cold in the keg on gas for two weeks and cold lagering for almost 8wks now. It's more of a taste than it is a haze, though there may be haze as well and I may not know how clear it should be since it's my first lager. I'll hold off adding anything for a little while longer and see what happens. Thanks.

Of course there is the distinct possibility I just screwed something up.

"I can imagine no more rewarding a career. And any man who may be asked in this century what he did to make his life worthwhile, I think can respond with a good deal of pride and satisfaction: 'I served in the United States Navy.'" JFK

It should be completely clear. I've not done lagers, but I've had a couple of ales that had some haze and a slightly odd taste that went away after I cleared with gelatin. Try cranking the temp down as low as you dare go without freezing anything for a few days and see if that helps.